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E. ace5 and Task Order
time limit per test
2 seconds
memory limit per test
256 megabytes
input
standard input
output
standard output

This is an interactive problem!

In the new round, there were n tasks with difficulties from 1 to n. The coordinator, who decided to have the first round with tasks in unsorted order of difficulty, rearranged the tasks, resulting in a permutation of difficulties from 1 to n. After that, the coordinator challenged ace5 to guess the permutation in the following way.

Initially, the coordinator chooses a number x from 1 to n.

ace5 can make queries of the form: ? i. The answer will be:

  • >, if ai>x, after which x increases by 1.
  • <, if ai<x, after which x decreases by 1.
  • =, if ai=x, after which x remains unchanged.

The task for ace5 is to guess the permutation in no more than 40n queries. Since ace5 is too busy writing the announcement, he has entrusted this task to you.

Input

The first line contains a single integer t (1t1000) — the number of test cases.

Interaction

The interaction between your program and the jury's program begins with reading a positive integer n (1n2000) — the length of the hidden permutation.

To make a query, output a line in the format "? i", where 1in.

As an answer, you will receive:

  • ">", if ai > x, after which x will increase by 1.
  • "<", if ai < x, after which x will decrease by 1.
  • "=", if ai = x, after which x will remain unchanged.

You can make no more than 40n queries. To output the answer, you need to print "! a_1 a_2 ... a_n", where 1ain, and all of them are distinct. Outputting the answer does not count as a query.

If your program makes more than 40n queries for one test case, or makes an invalid query, then the response to the query will be -1. After receiving such a response, your program should immediately terminate to receive the verdict Wrong Answer. Otherwise, it may receive any other verdict.

After outputting a query, do not forget to print a newline and flush the output buffer. Otherwise, you will receive the verdict Presentation Error. To flush the buffer, use:

  • fflush(stdout) or cout.flush() in C++;
  • System.out.flush() in Java;
  • flush(output) in Pascal;
  • stdout.flush() in Python;
  • see the documentation for other languages.

It is guaranteed that the sum of n over all test cases does not exceed 2000.

The interactor in this problem is not adaptive.

Hacks:

To make a hack, use the following format:

The first line contains a single integer t — the number of test cases.

The description of each test case should consist of two lines. The first line contains the numbers n and x (1xn2000) — the length of the hidden permutation and the initial value of the number x. The second line contains n distinct numbers a1,a2,,an (1ain) — the permutation that the jury should choose in this test case.

Sum of n over all test cases should not exceed 2000.

Example
Input
2
5

>

=

<

=

<

<

2

>
Output
? 4

? 2

? 1

? 5

? 1

? 3

! 2 4 1 5 3

? 1

! 2 1 
Note

In the first test, the hidden permutation is a = [2,4,1,5,3], and the initial value of x is 3.

In the second test, the hidden permutation is a = [2,1], and the initial value of x is 1.